Indication of initial active bandwidth part

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs), each initial active BWP being smaller than a full available BWP. The UE may select an initial active BWP from the one or more initial active BWPs. The UE may transmit a random access channel message based at least in part on a first parameter, of the one or more parameters, that corresponds to the selected initial active BWP. Numerous other aspects are described.

What is claimed is: 
     
         1 . A user equipment (UE) for wireless communication, comprising:
 one or more memories; and   one or more processors, coupled to the one or more memories, configured to:
 receive information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs), each initial active BWP being smaller than a full available BWP; 
 select an initial active BWP from the one or more initial active BWPs; and 
 transmit a random access channel (RACH) message based at least in part on a first parameter, of the one or more parameters, that corresponds to the selected initial active BWP, wherein at least one of:
 the first parameter includes a logical channel identifier (LCID), or 
 the RACH message indicates a second parameter that indicates at least one of:
 a quantity of msg3 repetitions, 
 a quantity of msgB repetitions, 
 a set of multiple-input multiple-output layers, 
 a periodicity of monitoring occasions, 
 an offset of monitoring occasions, or 
 a discontinuous reception setting. 
 
 
   
     
     
         2 . The UE of  claim 1 ,
 wherein the first parameter includes a preamble index, and wherein transmitting the RACH message includes transmitting a preamble that is associated with the preamble index.   
     
     
         3 . The UE of  claim 1 ,
 wherein the first parameter indicates a RACH occasion (RO), and wherein the one or more processors, to transmit the RACH message, are configured to transmit the RACH message in the RO.   
     
     
         4 . The UE of  claim 1 ,
 wherein the first parameter includes the LCID.   
     
     
         5 . The UE of  claim 4 ,
 wherein the RACH message includes a msg3 RACH message that indicates the LCID.   
     
     
         6 . The UE of  claim 4 ,
 wherein the RACH message includes a msgA RACH message that indicates the LCID in a physical uplink shared channel portion of the msgA RACH message.   
     
     
         7 . The UE of  claim 1 ,
 wherein the RACH message indicates the second parameter.   
     
     
         8 . The UE of  claim 7 ,
 wherein the second parameter indicates one or more of the quantity of msg3 repetitions or the quantity of msgB repetitions.   
     
     
         9 . The UE of  claim 7 ,
 wherein the second parameter indicates the set of multiple-input multiple-output layers.   
     
     
         10 . The UE of  claim 7 ,
 wherein the second parameter indicates one or more of the periodicity of monitoring occasions or the offset of monitoring occasions.   
     
     
         11 . The UE of  claim 7 ,
 wherein the second parameter indicates the discontinuous reception setting.   
     
     
         12 . The UE of  claim 1 ,
 wherein the one or more processors, to receive the information, are configured to receive the information in a broadcast message during an idle mode of the UE.   
     
     
         13 . The UE of  claim 1 ,
 wherein the one or more processors, to receive the information, are configured to receive the information in a handover command.   
     
     
         14 . The UE of  claim 1 ,
 wherein the one or more processors are configured to communicate in the initial active BWP.   
     
     
         15 . The UE of  claim 14 ,
 wherein the one or more processors, to communicate in the initial active BWP, are configured to transmit or receive a communication in an initial active uplink BWP.   
     
     
         16 . The UE of  claim 1 ,
 wherein the one or more processors, to communicate in the initial active BWP, are configured to communicate in the initial active BWP after receiving a msg4 RACH message that configures the UE to use the initial active BWP.   
     
     
         17 . A network entity for wireless communication, comprising:
 one or more memories; and   one or more processors, coupled to the one or more memories, configured to:
 transmit information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs) that a user equipment (UE) is to use for communicating, each initial active BWP being smaller than a full available BWP; 
 receive a random access channel (RACH) message that is associated with a first parameter, of the one or more parameters, that corresponds to an initial active BWP selected by the UE; and 
 transmit a message that configures the UE to use the initial active BWP, wherein at least one of:
 the first parameter includes a logical channel identifier (LCID), or 
 the RACH message indicates a second parameter that indicates at least one of:
 a quantity of msg3 repetitions, 
 a quantity of msgB repetitions, 
 a set of multiple-input multiple-output layers, 
 a periodicity of monitoring occasions, 
 an offset of monitoring occasions, or 
 a discontinuous reception setting. 
 
 
   
     
     
         18 . The network entity of  claim 17 ,
 wherein the first parameter includes a preamble index, and wherein the one or more processors, to receive the RACH message, are configured to receive a preamble that is associated with the preamble index.   
     
     
         19 . The network entity of  claim 17 ,
 wherein the first parameter indicates a RACH occasion (RO), and wherein the one or more processors, to receive the RACH message, are configured to receive the RACH message in the RO.   
     
     
         20 . The network entity of  claim 17 ,
 wherein the first parameter includes the LCID.   
     
     
         21 . The network entity of  claim 20 ,
 wherein the RACH message includes a msg3 RACH message that indicates the LCID.   
     
     
         22 . The network entity of  claim 20 ,
 wherein the RACH message includes a msgA RACH message that indicates the LCID in a physical uplink shared channel portion of the msgA RACH message.   
     
     
         23 . The network entity of  claim 17 ,
 wherein the RACH message indicates the second parameter, wherein the second parameter indicates one or more of the quantity of msg3 repetitions, the quantity of msgB repetitions, the set of multiple-input multiple-output layers, the periodicity of monitoring occasions, the offset of monitoring occasions, or the discontinuous reception setting.   
     
     
         24 . The network entity of  claim 17 ,
 wherein the one or more processors, to transmit the information, are configured to transmit the information in a broadcast message or in a handover command.   
     
     
         25 . The network entity of  claim 17 ,
 wherein the RACH message indicates the second parameter, wherein the second parameter indicates one or more of the quantity of msg3 repetitions, the quantity of msgB repetitions, the set of multiple-input multiple-output layers, the periodicity of monitoring occasions, the offset of monitoring occasions, or the discontinuous reception setting.   
     
     
         26 . A method of wireless communication performed by a user equipment (UE), comprising:
 receiving information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs), each initial active BWP being smaller than a full available BWP;   selecting an initial active BWP from the one or more initial active BWPs; and   transmitting a random access channel (RACH) message based at least in part on a first parameter, of the one or more parameters, that corresponds to the selected initial active BWP, wherein at least one of:
 the first parameter includes a logical channel identifier (LCID), or 
 the RACH message indicates a second parameter that indicates at least one of:
 a quantity of msg3 repetitions, 
 a quantity of msgB repetitions, 
 a set of multiple-input multiple-output layers, 
 a periodicity of monitoring occasions, 
 an offset of monitoring occasions, or 
 a discontinuous reception setting. 
 
   
     
     
         27 . The method of  claim 26 ,
 wherein the first parameter includes the logical channel identifier.   
     
     
         28 . The method of  claim 26 , wherein the first parameter includes the LCID. 
     
     
         29 . A method of wireless communication performed by a network entity, comprising:
 transmitting information that indicates one or more parameters that correspond to one or more initial active bandwidth parts (BWPs) that a user equipment (UE) is to use for communicating, each initial active BWP being smaller than a full available BWP;   receiving a random access channel (RACH) message that is associated with a first parameter, of the one or more parameters, that corresponds to an initial active BWP selected by the UE; and   transmitting a message that configures the UE to use the initial active BWP, wherein at least one of:
 the first parameter includes a logical channel identifier (LCID), or 
 the RACH message indicates a second parameter that indicates at least one of:
 a quantity of msg3 repetitions, 
 a quantity of msgB repetitions, 
 a set of multiple-input multiple-output layers, 
 a periodicity of monitoring occasions, 
 an offset of monitoring occasions, or 
 a discontinuous reception setting. 
 
   
     
     
         30 . The method of  claim 29 ,
 wherein the first parameter includes the LCID.